Two-dimensional diverse imaging method for high-speed space debris with small size

According to the signal model of space debris, the frequency diversity technology was reconciled in the imaging method. The frequency diversity can suppress the angle glint of debris, and the average signal-to-noise ratio of echo will be improved. Meanwhile, the demand of bandwidth of two-dimensional imaging of high-speed space debris with small size was too wide to realize, then the low-resolution signal was used to the high-resolution imaging, the bandwidth was much smaller than the need of ISAR, and the influence of the equivalent integration angle caused by high-speed was considered, through the estimation of the equivalent rotating speed, the matched-filter was corrected, which can match the need of rotating imaging and accomplish the imaging. Finally, a simulation of trumpet debris was modeled and made by the method projected in this paper. The result indicates that the method can suppress the angle glint of debris during the time of imaging, and the high resolution image is achieved.